KTM 990 Super Duke (2006) vs Yamaha XT 660X (2013)
Comparison technical specifications
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| Make: | KTM | Yamaha |
| Model: | 990 Super Duke | XT 660X |
| Years: | 2006 | 2013 |
| Engine: | Four stroke, 75°V-twin cylinder, DOHC, 4 valves per cylinder | Four stroke, single cylinder, SOHC, 4 valve |
| Capacity: | 999.8 cc / 60.9 cu-in | 659 cc/ 40.2 cu-in |
| Bore x Stroke: | 101 x 62.4mm | 100 x 84 mm |
| Cooling System: | Liquid cooling, | Liquid cooled |
| Compression Ratio: | 11.5:1 | 10: 1 |
| Lubrication: | Dry-sump lubrication with 2 rotor pumps | Dry sump |
| Induction: | Electronic fuel injection / electric | Fuel injection, 44 mm throttle body |
| Ignition: | Contactless, controlled, fully electronic ignition system with digital ignition timing adjustment | TCI |
| Starting: | Electric | Electric |
| Max Power: | 88 kW / 120 hp @ 9000 rpm | 33.8 kW / 48 hp @ 6000 rpm |
| Max Torque: | 100 Nm @ 7000 rpm | 58.4 Nm / 5.7 kgf-m @ 5250 rpm |
| Clutch: | Wet multi-disc clutch, operated hydraulically | Wet, multiple-disc coil spring |
| Transmission: | 6 Speed | 5 Speed |
| Final Drive: | Chain, X-Ring 5/8 x 5/16" | Chain |
| Frame: | Chromium-Molybdenum trellis frame, powder-coated Subframe Aluminium Handlebar Aluminium Ø 28/22 mm (1.89"), tapered | Steel tubular diamond frame with dual tank rails |
| Front Suspension: | 48mm WP Upside down adjustable | 43 mm Telescopic forks, |
| Front Wheel Travel: | 135 mm / 5.3 in | 225 mm / 8.8 in |
| Rear Suspension: | WP shock, fully adjustable | Oscillating arm standard Monocross. |
| Rear Wheel Travel: | 160 mm / 6.3 in | 200 mm / 7.9 in |
| Front Brakes: | 2x 320mm discs 4 piston calipers | Single 320mm disc 4 piston caliper |
| Rear Brakes: | Single 240mm disc 1 piston caliper | Single 245mm disc 1 piston caliper |
| Front Tyre: | 120/70 ZR17 | 120/700-17 |
| Rear Tyre: | 180/55 ZR17 | 160/60-17 |
| Rake: | 24° | 26.0° |
| Trail: | 103 mm / 4.0 in | 94 mm / 3.7 in |
| Wheelbase: | 1438 mm / 56.6 in | 1505 mm / 59.3 in |
| Seat Height: | 855 mm / 33.6 in | 875mm / 34.4 in |
| Ground Clearance: | 165 mm / 6.4 in | 210 mm / 8.3 in |
| Dry Weight: | 186 kg / 410 lbs | 173 kg / 318.4 lbs |
| Fuel Capacity: | 18.5 Litres / 4.8 gal | 15 Litres / 3.9 gal |